package com.kfm.servlet;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebServlet("/requestB")
public class RequestBServlet extends HttpServlet {
    @Override
    protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        System.out.println("requestB service ...");
        System.out.println(req.getAttribute("msg"));
        // 从request域中删除某个信息 removeAttribute(key)
        req.removeAttribute("msg");
    }
}
